Thread-cutter.



J. C. MOON.

THREAD CUTTER.

APPLICATION FILED MAY I8, 1915.

Patented July 10, 1917.

2 SHEETSSHEET l.

J. C. MOON.

THREAD CUTTER.

APPLICATION FILED MAY 18, I916.

MWWW 4 L Mam Patented July 10, 1917.

2 SHEETSSHEET 2 II I R QQJYUSM UNITED @TATFE PATENT @FFJWE.

JOHN C. MOON, OF ST. LOUIS, MISSOURI.

THREAD-CUTTER.

Application filed May 18, 1916.

To all whom it may concern: I

Be it known that I, JOHN C. MOON, a citizen of the United States,residing at the city of St. Louis, State of Missouri, have inventedcertain new and useful Improvements in Thread-Gutters, of which thefollowing is a full, clear, and exact description, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which Figure 1 is a side elevational view of myimproved pipe threading machine.

Fig. 2 is a top plan view of a portion thereof.

Fig. 3 is a vertical sectional view through the clamping devices.

Fig. i is a side elevational view of said clamping devices.

This invention relates to a new and useful improvement in pipe threadingmachines, the object being to thread two pipes at the same time.

In a companion application filed by me May 18, 1916, Serial No. 98,323,I have disclosed a pipe threading machine in which both ends of the pipeor rod are simultaneously threaded. This involves the use of a rockingclamping device in which the threaded rod or pipe is moved away from thecutters and the clamping jaws opened to permit the removal thereof andthe introduction into position of a rod or pipe to be threaded. Duringthis removal and introduction, the clamped rod or pipe is being threadedat each end. When the clamping devices are rocked, the unthreaded pipeor rod is placed in position and the cycle of operations above describedis repeated.

In the companion application, just referred to, the cutting members werenecessarily arranged in alinement and rotated in opposite directions. Inmy present construction, the cutting members are not in alinement butare staggered with relation to each other and, as they operate uponopposite ends of different pipes, they are rotated in oppositedirections. The construction of the cutters in my present applicationand the means for closing then, advancing them, opening them, andretracting them, is substantially the same as in the companionapplication referred to and therefore such construction and operationneed not be described here.

Specification of Letters "Patent.

Patented July 111*, 1917.

Serial No. 98,324.

My present invention contemplates the simultaneous threading of twopipes or rods and consists in the construction, arrangement, andcombination of means for simultaneously operating the clamping devicesving curved recesses in their inner faces to cooperate with the pipes A.and B. to clamp them in position. 6 are links connected with the lowerends of the clamping jaws 5 and to rocking levers 7 the latter beingkeyed upon shafts 8 which are mounted in bearings in the castings 2.There are two of these shafts 8, one for each side of the clamping jaws,said shafts being independently movable so as to equalize the pressureat the four points upon the two pipes clamped in position. The lever 7with the links 6 form toggles which, when moved toward the line ofcenters actuate the jaws 5 to exert pressure upon and securely grip thepipes A. and 13., but when said lever 7 is-rocked in the oppositedirection, the aws 5 will be drawn away from the fixed jaws -1- torelease the pipes. hen the jaws are open and the pipes are placed inreadiness to be threaded, they are positioned against adjustable stops 9mounted on suitable brackets secured to the castings 2. Each shaft 8 isprovided with a rock arm 10 and these rock arms are connected by links11 to an equalizing bar 12 mounted upon the upper end of rod 13. Rod 13is connected to foot lever 14 which is normally held up by means of aspring 15 the action of which serves to open the jaws The operation ofthe device is, briefly, as follows:

The pipes are adjusted in position against fixed jaws 1 after which footlever 14 is depressed, which action forces jaws 5 against said pipes,thereby clamping and holding them against rotation; after which thehandles 15 are moved clockwise to force the rotating shafts 3 inwardlyso that their cutters' will engage and thread the opposite ends of thetwo pipes clamped in position. When the work of the cutters isperformed, they are moved outwardly and shafts 3 are then'retracted,whereupon the operator releases the foot lever 14, the jaws 5 swing awayfrom the fixed jaws at under influence of the spring 15, the threadedpipes are removed and other pipes to be threaded, introduced intoposition.

There are two movable clamping jaws, one for each pipe and consequentlythere are four clamping jaws for the two pipes, and the equalizing bar12 will cause all four of these clamping jaws to exert an equal pressureat two points upon each pipe. The amount of this pressure may beregulated by the operator.

I claim:

1. In a pipe threading machine, the combination with a pair ofoppositely disposed thread cutters, the same being offset with respectto each other, of oppositely disposed fixed pipe receiving elementsarranged between said thread cutters, a plurality of oppositely movableclamping jaws cotiperating with said fixed pipe receiving means, togglemechanisms connected to said clampingjaws for moving the same, pluralmeans for operatin said to le mechanisms and a e ual- 72 Db 7 .v

izing member connected to said toggle mechanism operating devices.

2. I11 a pipe threading machine, a pair of oppositely disposed threadcutters, the same being o fset with respect to each other, man uallyoperable means for moving said cutters toward and away from each other,pairs of pipe clamping devices arranged between said cutters, whichdevices are ofiset with respect to each other so as to permit twoengaged pipes to lie parallel with each other with each pipe inalinement with the axis of one of the thread cutters, and togglemechanisms for simultaneously actuating said clamping devices.

3. In a pipe threading machine, a pair of oppositely disposed threadcutters, the same clamping devices,

being offset with respect to each other, manually operable means formoving said cutters toward and away from each other, pairs of pipeclamping devices arranged between said .cutters, which devices areoffset with respect to each other so as to permit two engaged pipes tolie parallel with each other with each pipe in alinement with the aXisof one of the thread cutters, toggle mechanisms for simultaneouslyactuating said clamping devices, and an equalizing member connected tosaid toggle mechanisms.

+1, In a pipe threading machine, a pair of oppositely disposed threadcutters, the same being offset with respect to each other, manuallyoperable means for moving said cutters toward and away from each other,pairs of pipe clamping devices arranged between said cutters, whichdevices are offset with respect to each other so as to permit twoengaged pipes to lie parallel with each other with each pipe inalinement with the axis of one of the thread cntters, toggle 1nechanislns for simultaneously actuating said and adjustable stops againstwhich an end of each pipe is adapted to engage. V r

In a pipe threading machine, a base, a pair of oppositely arranged fixedjaws thereon, a. pivotally mounted jaw arranged opposite to and adaptedto cooperate with each fixedj a w, means for simultaneously operatingthe pivotally mounted jaws, thread cutters movable toward and away fromthe pairs of jaws, and adjustable stops against which the ends of thepipes carried by said jaws are adapted to hear so as to gage thepositions of said pipes relative to the thread cutters.

In testimony whereof I hereunto affix my signature in the presence oftwo witnesses,

this 15th day of May, 1916.

JOHN ,0. oon.

lVitnesses:

M. SMITH, M- .-,H N.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, 1L0.

